Designation:D3939/D3939M−13(Reapproved2017)StandardTestMethodforSnaggingResistanceofFabrics(Mace)1ThisstandardisissuedunderthefixeddesignationD3939/D3939M;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethoddeterminesthesnaggingresistanceofafabric.1.2Studiesoffabricsnagginghaveshownthatthistestmethodissuitableforarangeofwovenandknittedfabricsmadefromtexturedoruntexturedfilamentyarnsorspunyarnsorcombinationsoftheseyarns.2,3Thistestmethodisnotsuitablefor(1)openconstructionfabrics(suchasanet)becausethepointsonthemacewillsnagthefeltpadratherthanthespecimen,(2)veryheavyorverystifffabricsthatcannotbemadetofittightlyonthedrumandfeltpad,and(3)tuftedornonwovenfabricsbecausetheapparatusisdesignedforwovenandknittedfabrics.1.3Ifafterusingthistestmethoditisfoundtobetoosevereforyourfabrics,analternativemethodcanbeused,suchasBS8479Textiles:MethodforDeterminationofthePropensityofFabricstoSnaggingandRelatedSurfaceDefects-RotatingChamberMethod.1.4ThevaluesstatedineitherSIunitsorinotherunitsshallberegardedseparatelyasthestandard.Thevaluesstatedineachsystemmaynotbeexactequivalents;therefore,eachsystemmustbeusedindependentlyoftheother,withoutcombiningvaluesinanyway.Incaseofrefereedecisions,theSIunitswillprevail.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.Specificprecau-tionarystatementsaregiveninSection7.1.6Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierst...
